magnesia hercynite brick/refractory brick/zhenjin
Product Description
Features: This product belongs to new chrome-free basic refractories for large rotary kilns developed by our company. It is produced with high quality synthetic spinel materials and special technical process. The product is characterized by high crushing strength, good thermal shock resistance, good thermal creep, high refractoriness under load, also has the characteristics of direct bonded magnesia-chrome brick (easily adhering the furnace crust), and has solved the problem of environment pollution of sexavalent chrome forming during the use magnesia-chrome brick in cement kiln.
The development and application of Zhenjin company’s pleonaste brick conform to the trend of magnesite-chrome brick withdrawing from the historical stage in the cement industry, meet the demand of chrome-free basic refractories in cement industry under the new environmental-friendly situation.
Applications:Burning zone of large dry-process cement rotary kiln.
Size: Customizable.
Technical Data:
|
item
|
index
|
|
QB/ZJMFA-1
|
QB/ZJMFA-2
|
QB/ZJMFA-3
|
|
Chemical composition
|
MgO % ≥
|
88
|
86
|
85
|
|
Fe2O3 %
|
3-5
|
5-7
|
3-5
|
|
A12O3 %
|
3-5
|
3-5
|
7-9
|
|
SiO2 % ≤
|
1.0
|
1.0
|
1.0
|
|
Bulk density（g/cm3）
|
2.95
|
2.95
|
2.95
|
|
Apparent porosity % ≤
|
16
|
16
|
16
|
|
Cold compression strength MPa ≥
|
80
|
80
|
80
|
|
Refractoriness under load ℃
[0.2MPa×0.6%] ≥
|
1700
|
1650
|
1680
|
|
Thermal shock resistance，time
[1100℃，water-cooling] ≥
|
10
|
8
|
10
|
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